A mains electricity power point mounted in or on a wall inside a dwelling or other building. / Any outlet or recess in a wall.

(marketing) In retail selling, a large, visually appealing display of products intended to attract the interest of customers.

present participle of climb the walls

(idiomatic) To behave in a distressed or frantic manner; to exhibit great agitation.

(squash, racquetball) The main and largest wall in court, located at the front of the world; the wall which the ball must hit in a rally. / Used other than figuratively or idiomatically: see front, wall.

(squash, racquetball) The wall at the back of a racquetball or squash court, directly opposite the front wall. / Used other than figuratively or idiomatically: see back, wall.

(squash, racquetball) Either of the two parallel walls in a court, perpendicular to the front wall; either of the walls on the side of the court.

A brick wall reinforced with horizontal wires for stability.

Alternative spelling of fourth wall

(climbing) An artificial wall used for the sport of climbing